Lung surgery under thoracotomy is known to induce long-term pain which can be considered as neuropathic in many patients concerned [1,2]. The suspected origin of neuropathy is a direct traumatism of intercostal nerve(s) [3]. Among the possible preventive treatments that can be administered during the initial aggression, ketamine [4,5] appears as the easiest to use, as it is already commonly administered intra and postoperatively for improvement of analgesia [6].